Sifter



A. W. FLANNIGAIN.

SIFTEB.

APPLICATION FILED NOV-21.1919.

Patented July s as hereinafter described and defined by the UNITED STATES.

ANDREW W. FLANNIGAIN, OF MILWAUKEE, WISCONSIN.

srrrnn Specification of Letters Patent. v

Patented July 12, 1921.

Application filed November 21, 1919. Serial No. 339,573.

To all whom it may concern: I p

Be it known that I, ANDREW W. FLANNI- GAIN, a citizen of the UnitedStates, and resident of Milwaukee, in the county of Milwaukee and State of WVisconsin, have 111- vented certain new and useful Improvements in Sifters; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to new and useful improvements in sifters, more particularly of that domestic type adapted for use for sifting flour and the like.

It is in general the objectof my inventlon to simplify and otherwise im rove the structure and to increase the efliciency of devices of this character, and the ease and convenience of assembly and disassembly thereof, whereby suchdevices may be readily taken apart and cleaned by the average housew fe. It is more particularly my object to provide an arrangement whereby a double sifting action may be procured by the, provision of superposed screen members each having an agitator element movable thereover.

A further object resides in the provision of a sifter deviceembodying theafore recited advantageslwhich. may be most eco-.

nomically constructed of stamped metal sheeting.

With the above and other objects and advantages inv view, which will be apparent as the description proceeds, my invention resides in the novel features of construction, combination and arrangement of the parts appended claims. a

In the accompanying drawings:

Figure 1 is a central vertical sectional view through a sitter constructed inaccord-.

ance with my invention, the plane of this section being indicated by line "11' of against rotation.

Fig. 2. t

Fig. 2, is a transverse sectional view through. the sifter on a plane'indicated by the line 22 of 1. f i

Fig. 3,is a view of the disassembled parts showing the interlocking relation I of the c p the agitator hub portions is provided', with an aperture 19 corresponding to cross'section,

sifter to the agitator members.

Fig; 4 is'a detail sectional view ofthe ,rangement for holding thescreen members Referring ,now more particularly to the drawings, the body of my improved sifter comprises a main cylindrical section 5 ha g its low r e e P onou wardly b g d shaft 9.

to form a slight head 6 over which isenr gageable the flared end of arelatively short lower body section 7, whereby said bod sections are detachably connected bythe frict onal engagement of their overlapped meeting portions. A bar 8 extends transversely across the intermediate portion of the main body section 5 and is centrally ap-- ertured to provide a bearing for an axia disposed operating shaft, 9, the bar8 being formed of a strip of sheet metal having its side edge portions laterally turned to pro vide a channel shape affording requisite strength. This shaft 9 has a lower bearing in aspider member 10 secured in the lower portion of the lower body section 7, this spider member being stamped from a plate of sheet metal and having its arms bentin channel shape, with their ends extended through the wall ofthe section 7 and bent to secure the spider member ,inplace.

I provide in the present instance a pair of screens 11, these screens beingcentrally apertured to ture. s

The peripheral portions ofthe' screens are secured to; a pair of bands 12 which are of such dlameter as a fit, snugly within the lower body section 7, the widths ofi'the bands,

being such asto extend between the spider 10 and the loweredge of the mainbody section 5 whereby the bands and screens are held in position when the body'sections are.

assembled. To prevent rotation of the screens, the lower band is recessed at to receive the arms of the spider 10, and is also loosely receive the shaft struc recessed to receive depending projections 14;

ofthe upper band. I

An agitator memberis provided for each screen 11 comprising a plurality of arms 15 radiating from a hub plate portion 16 which is in interlocking connection with the This interlocking connection is procured in the present instance by a sleeve 17 formed of a pair of longitudinally bowed plate strips having their (side edges .con-

nected, said connected side edges forming longitudinal ribs 18 on, the sleeve. Each of spidermember 10 and the .upper endofthef sleeve is notched "for the reception of lug p rt ons ,2 stnw1; tra n the adj cent tion of the shaft whereby to hold the sleeve 7 against upward sliding movement on the shaft and to impart rotative movement to the sleeve upon rotation of the shaft. The

sleeve and shaft are held'in assembled relation by a nut 21 threaded; on the lower end of the shaft and bearing against the sifter member 10. The sides of each agitator arm are bent in opposite directions to provide scraper edges effective in co-action with the corresponding screen 11 in whatever manner the'agltator members are assembled on the shaft sleeve;

' body sections 5 and 7 threadedo-n'the said extremity of the shaft The upper end of the shaft 9 is extended above the bodyof the sifter and bent to f-orm'a crank handle 22. Thus,'upon turning'said crank handle, the agitator members will be rot'ated each upon its respective screen 11 whereby an eflicient double sifting action may be most conveniently effected. The entire device may be disassembled by removing the hub 21 and separating the In assembling the device, the screen .con-

necting bands 12 are disposed within the lower body section 7 with the agitator memberspositioned on the screens The sleeve 17 is then mounted on the shaft and the screen andshaft are inserted through the apertures ofthe screens and agitator hubs lfiand the extremity of the shaft is passed through the spider 10. The nut 21 is then shaft ,9, whichwould'b'e form'edof standard of the agitator members.

stool; material,'provides most economically for a maximum desired size of the shaft structure engaging with the hub plates 16 The upper ends of the ribs 1V8.of the sleeve are bent laterally at 231:0 prevent possible displacement of the upper agitator member. 5

\Vh'le I have shown and described a preferred embodiment of my invention, it. will be appreciated that various changes and modifications of structure may be employed m meet differing -conditions of use and manufacture,withoutdeparting in any man.- ner from the spirit of my invention.

is claimed is: fj 1, sifterof the class described comprising acylindricalbody member, a spiderin the'lerer p i n o the ody e e a screen disposed. inthe body member above thespi'der, a extendingaxially through thebody member and through thescreenand spidercmembfi means carriedibyi said shaft and engagingthe spider member for holding the shaft againstlongitudinal movement in 7 either direction andan agitator member on the shaft co-actlng with the screen.

jection on the intermediate portion of the shaft engaged inthe recessed endof the sleeve, a nut threaded onjthe outer end of the shaft and engaging the spider to hold the sleeve and shaft, and an agitator member including a hub portion apertured to correspond to the cross section ofthe sleeve and its rib projection and mounted thereon.

3. A sifter of the class described comprising a cylindrical body member, a spider in the lower portion of the body member and rigidly attached thereto, a screen mounted in the body member above the spider, a shaft extending axially through the body member and throughthescreen andspider member, means carried by said shaft and engaging the spider member for holding the shaft against longitudinal movement in either direction, a non-circularsleeve on said shaft and secured so as torotate therewith, and an agitator member fcarried onsaid sleeve and co-acting with said screen. a i

4i. A sifter'of the class described comprising a cylindrical body member, a spider member in the lower portion ofthe body member, a screen member mounted in the lower portionof the body above the spider. member, a shaft extending axially through the body. member and through the screen and spider,

; 2. A sifter of the class describedcomprisa bearing for the shaft carried byfithebody member above the screen, a non-circular sleeve keyed on said shaft, and anragitator. member on said sleeve lmmedlately above andcoacting with said screen.

5 A sifter of the classtdescribed comprisinga cylindrical bodymember, a' pair, of spaced screens extending. across the. body;

vmember, a shaft journaled centrally in said body member, a 'non-circular sleeve on said shaftandsecured soas to rotate therewith,

of said sections aband mountedi'n saidfsec tion and confined between thespider and the a ja e an 0 t e other s ct-Mn, a scr e carried. by said band, a shaft extending axially through said section and journaled in the spider, a non-circular sleeve on said shaft, one end of said sleeve bearing against said spider, the other end of said sleeve having a recess therein, a lug on said shaft extending into said recess thereby causing said sleeve to rotate with said shaft, and an agitator member carried by said sleeve for coaction with the screen.

7. A sitter of the class described comprising a cylindrical body member formed of a pair of sections adapted for detachable connection, a spider in the outer portion 01' one of said sections, a pair of bands mounted in said section having their adjacent edges in abutting contact, with their other edges in contact respectively with the spider member and the adjacent end of the other section, a screen carried by each band, a shaft extendingaxially through the body sections and through the screens and journaled in the spider, a non'circular sleeve on said shaft,

one end of said sleeve bearing against said spider, the other end of said sleeve having a recess therein, a lug on said shaft extending into said recess thereby causing said sleeve to rotate With said shaft andagitator members on said sleeve coactin with said screens.

8. A sitter of the c ass described comprising a cylindrical body member formed of a pair of sections adapted for detachable connection, a spider in the outer portion of one of said sections, a band mounted in said section and held in abutting relation With said spider, recesses formed in said band and receiving the arms of the spider to hold said hand against rotation, a screen carried by said band, a shaft extending axially through the body members and through the screen and journaled in the spider, and an agitator member on said shaft coacting with said screen.

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee, in the county of Milwaukee and State of Wisconsin.

ANDREW W. FLANNIGAIN. 

